A Barrel of oil is 31.5 Gallons (4032 ounces, or 56 six-packs). Don't ask me who decided this matter.
$73/Barrel equals $2.32/Gallon of Crude. Refine it, add sales taxes and maybe a nickle or two of profits to the individual gas station, and there you have it.
Told you it was useless.
FP